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It sure does look like hire algae, but there also looks like something else is there as well.

Is it easy to clean off your does it stick to the rocks really well ?

Is it more slimy in texture or is it more solid ?

If you take your time to do the research FIRST, you can successfully set-up and keep ANY type of aquarium with ease."Not using a quarantine tank is like playing Russian roulette. Nobody wins the game, some people just get to play longer than others." - Anthony CalfoFishless CycleCycling with FishMarine Aquarium Info [URL="http://saltwater.aquaticcommunity.com/"]

Do you know your current nitrate, phosphate, dHK, Cal, and Mag levels ?

Typically, lowering phosphates undetectable levels, and nitrates less than 2 ppm, while maintaining your Mag to around 1400ppm should beat most algaes. The other parameters (when kept in line) will keep your pH stable through the whole process

If you take your time to do the research FIRST, you can successfully set-up and keep ANY type of aquarium with ease."Not using a quarantine tank is like playing Russian roulette. Nobody wins the game, some people just get to play longer than others." - Anthony CalfoFishless CycleCycling with FishMarine Aquarium Info [URL="http://saltwater.aquaticcommunity.com/"]